| 稀土氧化物对甲烷催化氧化的分子束研究 |
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| 引用本文： | 王君容 何裕华. 稀土氧化物对甲烷催化氧化的分子束研究[J]. 南开大学学报(自然科学版), 1995, 28(2): 72-76,96 |
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| 作者姓名： | 王君容 何裕华 |
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| 作者单位： | 南开大学电子科学系 |
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| 基金项目： | 天津大学内燃机燃烧学国家重点实验室科学基金 |
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| 摘 要： | 通过分子束与表面散射实验确定甲烷在Ｌａ２Ｏ３清洁表面是平动能激活吸附，阈值平动能５３．４８ｋＪ／ｍｏｌ。氧在Ｌａ２Ｏ３清洁表面的吸附服从Ａｒｒｈｅｎｉｕｓ方程关系，其脱附峰在９６０Ｋ。
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| 关 键 词： | 分子束 甲烷 催化氧化反应 稀土氧化物 催化剂 |
THE MOLECULAR BEAM STUDY OF THE CATALYTIC OXIDATION OF METHANE BY RARE EEATH OXIDES |
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| Wang Junrong, He yuhua, Li Shenglin ,Shao Shumin , Zhou Zhiqiang, Xi Guangkang. THE MOLECULAR BEAM STUDY OF THE CATALYTIC OXIDATION OF METHANE BY RARE EEATH OXIDES[J]. Acta Scientiarum Naturalium University Nankaiensis, 1995, 28(2): 72-76,96 |
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| Authors: | Wang Junrong He yuhua Li Shenglin Shao Shumin Zhou Zhiqiang Xi Guangkang |
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| Abstract: | The methane molecular beam scattering experiments of La2O3 surface have been made. The adsorption of methane on the clean surface of La2O3 is the translational energy activation adsorption ,its threshold value is 53. 58 kJ/mol. The adsorption of oxygen on the clean surface of La2O3 is suited to the Arrhenius equation ,the desorption peak of oxygen is on 960K. The La2O3 surface coated oxygen can catalyze the oxidative reaction of methane ,its reaction product co_2 appeared above 800K. The key factor of this reaction is the translational energy of methane molecule. No product can be seen below the threshold value of thetranslational energy even though higher than 850K. |
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| Keywords: | molecular beam technigues translational energy sticking probability catalysis |
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